yann58 | A l'aide :
Bonjour,
J'ai un projet opengl fonctionne quand je passe wglCreateContext (mais la fonction est obsoléte et sera retirer dans le long terme),
Mais quand je veux utiliser la fonction de remplacement 'wglCreateContextAttribsARB' , aucun primitive dessiner ,seul la fonction glClearColor fonctionne.
Sur le web il n'y pas de sample utilisant la fonction wglCreateContextAttribsARB
Code :
- static void
- init_opengl_extensions(void)
- {
- // Before we can load extensions, we need a dummy OpenGL context, created using a dummy window.
- // We use a dummy window because you can only set the pixel format for a window once. For the
- // real window, we want to use wglChoosePixelFormatARB (so we can potentially specify options
- // that aren't available in PIXELFORMATDESCRIPTOR), but we can't load and use that before we
- // have a context.
- WNDCLASSA window_class = { 0 };
- window_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
- window_class.lpfnWndProc = DefWindowProcA;
- window_class.hInstance = GetModuleHandle(0);
- window_class.lpszClassName = "Dummy_WGL_djuasiodwa";
- if (!RegisterClassA(&window_class)) {
- fatal_error("Failed to register dummy OpenGL window." );
- }
- HWND dummy_window = CreateWindowExA(
- 0,
- window_class.lpszClassName,
- "Dummy OpenGL Window",
- 0,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- 0,
- 0,
- window_class.hInstance,
- 0);
- if (!dummy_window) {
- fatal_error("Failed to create dummy OpenGL window." );
- }
- HDC dummy_dc = GetDC(dummy_window);
- PIXELFORMATDESCRIPTOR pfd;
- pfd.nSize = sizeof(pfd);
- pfd.nVersion = 1;
- pfd.iPixelType = PFD_TYPE_RGBA;
- pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
- pfd.cColorBits = 32;
- pfd.cAlphaBits = 8;
- pfd.iLayerType = PFD_MAIN_PLANE;
- pfd.cDepthBits = 24;
- pfd.cStencilBits = 8;
- int pixel_format = ChoosePixelFormat(dummy_dc, &pfd);
- if (!pixel_format) {
- fatal_error("Failed to find a suitable pixel format." );
- }
- if (!SetPixelFormat(dummy_dc, pixel_format, &pfd)) {
- fatal_error("Failed to set the pixel format." );
- }
- HGLRC dummy_context = wglCreateContext(dummy_dc);
- if (!dummy_context) {
- fatal_error("Failed to create a dummy OpenGL rendering context." );
- }
- if (!wglMakeCurrent(dummy_dc, dummy_context)) {
- fatal_error("Failed to activate dummy OpenGL rendering context." );
- }
- wglCreateContextAttribsARB = (wglCreateContextAttribsARB_type*)wglGetProcAddress(
- "wglCreateContextAttribsARB" );
- wglChoosePixelFormatARB = (wglChoosePixelFormatARB_type*)wglGetProcAddress(
- "wglChoosePixelFormatARB" );
- wglMakeCurrent(dummy_dc, 0);
- wglDeleteContext(dummy_context);
- ReleaseDC(dummy_window, dummy_dc);
- DestroyWindow(dummy_window);
- }
- void EnableOpenGL(HWND hWnd, HDC* hDC, HGLRC* hRC)
- {
- init_opengl_extensions();
- // get the device context (DC)
- /*wglCreateContextAttribsARB = (wglCreateContextAttribsARB_type*)wglGetProcAddress(
- "wglCreateContextAttribsARB" );
-
- wglChoosePixelFormatARB = (wglChoosePixelFormatARB_type*)wglGetProcAddress(
- "wglChoosePixelFormatARB" );*/
- if ((wglCreateContextAttribsARB != NULL)&&(wglChoosePixelFormatARB!=NULL))
- {
- *hDC = GetDC(hWnd);
- // int pixel_format_attribs[] = {
- //WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
- //WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
- //WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
- //WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
- //WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
- //WGL_SAMPLE_BUFFERS_ARB, GL_TRUE ,
- //WGL_COLOR_BITS_ARB, 32,
- //WGL_DEPTH_BITS_ARB, 24,
- //WGL_STENCIL_BITS_ARB, 8,
- //0,0
- // };
- int pixel_format_attribs[] = {
- WGL_SUPPORT_OPENGL_ARB, 1,
- WGL_DRAW_TO_WINDOW_ARB, 1,
- /*WGL_DRAW_TO_BITMAP_ARB, 1,*/
- WGL_DOUBLE_BUFFER_ARB, 1,
- //WGL_SWAP_LAYER_BUFFERS_ARB, 1,
- WGL_COLOR_BITS_ARB, 32,
- WGL_RED_BITS_ARB, 8,
- WGL_GREEN_BITS_ARB, 8,
- WGL_BLUE_BITS_ARB, 8,
- WGL_ALPHA_BITS_ARB, 8,
- WGL_DEPTH_BITS_ARB, 8,
- WGL_STENCIL_BITS_ARB, 8,
- WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
- WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
- 0
- };
- int pixel_format;
- UINT num_formats;
- wglChoosePixelFormatARB(*hDC, pixel_format_attribs, 0, 1, &pixel_format, &num_formats);
- if (!num_formats) {
- fatal_error("Failed to set the OpenGL 3.3 pixel format." );
- }
- PIXELFORMATDESCRIPTOR pfd;
- DescribePixelFormat(*hDC, pixel_format, sizeof(pfd), &pfd);
- if (!SetPixelFormat(*hDC, pixel_format, &pfd)) {
- fatal_error("Failed to set the OpenGL 3.3 pixel format." );
- }
- // Specify that we want to create an OpenGL 3.3 core profile context
- int gl33_attribs[] = {
- WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
- WGL_CONTEXT_MINOR_VERSION_ARB, 3,
- WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
- 0,
- };
- *hRC = wglCreateContextAttribsARB(*hDC, 0, gl33_attribs);
- }
- else
- {
- *hRC = wglCreateContext(*hDC);
- wglMakeCurrent(*hDC, *hRC);
- }
- wglMakeCurrent(*hDC, *hRC);
- }
- #endif
- char checkShaderCompilation(GLuint shaderID)
- {
- GLint compilationStatus = 0;
- // Vérification de la compilation pour le vertex shader
- glGetShaderiv(opengl.vertexID, GL_COMPILE_STATUS, &compilationStatus);
- //if (compilationStatus != GL_TRUE)
- {
- // Nous savons que la compilation a échoué, donc nous devons savoir pourquoi
- // Nous devons récupéré la taille du log
- GLint logLength = 0;
- char* log = NULL;
- glGetShaderiv(shaderID, GL_INFO_LOG_LENGTH, &logLength);
- if (logLength > 0)
- {
- // Maintenant que nous avons la taille, nous pouvons alloué la mémoire suffisante pour ce log
- log = (char*)malloc(logLength);
- if (log == NULL)
- {
- fprintf(stderr, "Erreur d'allocation de mémoire pour le log de la compilation du shader\n" );
- return 0;
- }
- glGetShaderInfoLog(shaderID, logLength, &logLength, log);
- // On peut afficher le message
- fprintf(stderr, "Erreur de compilation:\n%s", log);
- MessageBox(NULL, log, NULL, MB_ICONHAND);
- // Et on n'oublie pas de libéré la mémoire
- free(log);
- return 0;
- }
- else
- return 1;
- }
- return 1; // Pas d'erreur
- }
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Ca ne marche pas , et j'y suis depuis 3 heures.
Pour information je travaille sous Vmware player 17.01 : 17.0.1 build-21139696
Ce n'est pas un probléme de shader.
Merci
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Aussi je suppose que tu as activé les Warnings de ton compilateur? Tu utilises lequel, GCC? Dans ce cas -Wall -Wextra -Werror à rajouter en ligne de commande.